12163442945 has 4 divisors (see below), whose sum is σ = 14596131540. Its totient is φ = 9730754352.

The previous prime is 12163442927. The next prime is 12163442953. The reversal of 12163442945 is 54924436121.

It is a Cunningham number, because it is equal to 110288²+1.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 54924436121 = 487 ⋅112781183.

It can be written as a sum of positive squares in 2 ways, for example, as 4378733584 + 7784709361 = 66172^2 + 88231^2 .

It is a cyclic number.

It is not a de Polignac number, because 12163442945 - 2¹⁰ = 12163441921 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1216344290 + ... + 1216344299.

It is an arithmetic number, because the mean of its divisors is an integer number (3649032885).

Almost surely, 2^12163442945 is an apocalyptic number.

It is an amenable number.

12163442945 is a deficient number, since it is larger than the sum of its proper divisors (2432688595).

12163442945 is an equidigital number, since it uses as much as digits as its factorization.

12163442945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2432688594.

The product of its digits is 207360, while the sum is 41.

The spelling of 12163442945 in words is "twelve billion, one hundred sixty-three million, four hundred forty-two thousand, nine hundred forty-five".